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Finding the Fourth Proportional to 90,439.76, 124,814.76 and 52,713.20

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Solution

The fourth proportional to 90,439.76, 124,814.76 and 52,713.20 is: 72,748.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,439.76 : 124,814.76 = 52,713.20 : x
  2. Step 2: Convert to fraction form
    90,439.76/124,814.76 = 52,713.20/x
  3. Step 3: Cross multiply
    90,439.76x = 124,814.76 × 52,713.20
  4. Step 4: Simplify right side
    90,439.76x = 6,579,385,406.83
  5. Step 5: Solve for x
    x = 6,579,385,406.83/90,439.76
  6. Step 6: Final answer
    x = 72,748.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.